• Title/Summary/Keyword: Railway transportation system

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A study on profitability of train schedule planning (열차공급계획의 수익성 분석에 관한 연구)

  • Woo Hee-Moon;Jang Seong-Yong;Kim Dong-hee
    • Proceedings of the KSR Conference
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    • 2004.10a
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    • pp.1538-1545
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    • 2004
  • In the train schedule plan corresponds to a master plan for transport services. This service plan must be constructed to minimize operational cost or maximize revenue considering transportation demands and resource capacities in the operation company, and it includes several sub-planning activities such as train operation frequency plan, train schedule plan, train capacity assignment plan, and rolling stock requirement plan. In this paper, we present profitability evaluation system for the current train schedule plan. The proposed system can be used for evaluating profitability by estimating train service revenue considering customer demands.

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Characteristic Analysis of The Efficiency of the Power Transfer of the IPT Using LLC Resonant Inverter (LLC 공진형 인버터를 이용한 IPT 전력전송 효율 특성 분석)

  • Kim, Ki-Byoung;Lee, Hyung-Woo;Park, Chan-Bae;Lee, Byung-Song;Kim, Nam-Po
    • Proceedings of the KSR Conference
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    • 2011.05a
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    • pp.401-408
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    • 2011
  • Nowadays, the development of sustainable transportation has been researched all over the world and Korea Railroad Research Institute (KRRI) is conducting a study in order to apply the sustainable Contactless Inductive Power Supply Technology to the electric railway system. But, inherent large flux leakage has limited the high power transmission because the gap of the Inductive Power Transformer(IPT) is much larger than one of the conventional transformers. In this study, a method to compensate the leakage flux and improve the power transmission by using LLC resonant inverter was proposed, incorporated in a built system, and verified by experimental work.

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An Analysis of Dynamic Characteristics for Running Safety Improvement of the Rubber Tired AGT Localization Bogie (고무차륜 경량전철 국산화 대차의 주행안전성 향상을 위한 동특성 해석)

  • Eom, Beom-Gyu;Han, Byeong-Yeon;An, Cheon-Heon;Kang, Bu-Byoung;Lee, Hi-Sung
    • Proceedings of the KSR Conference
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    • 2011.10a
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    • pp.1894-1904
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    • 2011
  • The Light Rail Transit (LRT) System which has medium transport capacity between subway and bus(5,000-25,000 persons per hour) is the most advanced transportation system. It has many benefits, cheap construction, operational costs through driverless and flexible route planning. Also, the rubber tired AGT (K-AGT) of various LRT has a rubber wheels and side guide. The side guide type has an many advantages. but occur a vibration and friction noise through contact between guide rail and wheel. Most of point that decreased comport is vibration thorough the guide contact. In this paper, It is purpose to improve the maximum running speed of rubber tired AGT localization bogie which is currently developed from 70km/h to 80km/h. To satisfy comport index of railway vehicle that is required in performance test. we examined coefficient of bogie suspension which is designed.

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A Study on the Successful Factors in the Application of RIMS Project for the Safe Operation of Rolling Stocks in the Public Transportation (공공교통 전동차 안전운행을 위한 RIMS 프로젝트 적용의 성공요인 연구)

  • Lee, Kang-Won;Bhang, Youn-Keun;Son, Young-Jin
    • Journal of the Korean Society for Railway
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    • v.9 no.5 s.36
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    • pp.555-560
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    • 2006
  • This study finds out and suggests success factors for the application of RIMS project through the case study of Seoul Metro and literature survey. The successful application of RIMS needs expert knowledge and concept of BOM, standardization of maintenance planning, check lists of heavy maintenance inspection, organization structure of rolling stock maintenance offices, material management system of warehousing and the process of parts repairing between offices, connection of material ordering system, problem solving of circular spare parts administration among inspection, maintenance, and material organizational units, systemic serial number management of parts with RFID, daily closing diary connected with work process chart, and sufficient period of RIMS's test run. RIMS contributes to real time management of rolling stock maintenance, transparency of management, reliability of train operation, customer satisfaction, and management innovation.

A Study on the Control a Group of Trains for Energy Saving by Synchronized Driving (동기화 운전을 통한 에너지 절약형 열차군 관리에 관한 연구)

  • Kim, Kyung-Min
    • Proceedings of the KSR Conference
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    • 2010.06a
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    • pp.1159-1165
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    • 2010
  • This paper describes an energy efficient train control. In these days, the researchers develop the energy efficient railway technologies, such as energy storage system, energy efficient driving. Mass rapid transit (MRT) railways, which are an important means of public transportation in urban areas, have operational characteristics that include short headways, frequent departures and arrivals. Therefore, when multiple trains are operating in the same power supply system, it is important to synchronize the energy tractions and regenerations. This paper define the group of trains for energy saving according to a power supply. We analyze the current synchronized driving situations and estimate the effect.

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A Review on the Operation of High Speed Train on Urban Regions (도시철도 급행열차 운행방안 검토)

  • Chung, Su-Young;Lee, Jae-Bong;Lee, Jong-Seong;Lim, Byeong-Guk
    • Proceedings of the KSR Conference
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    • 2010.06a
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    • pp.98-103
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    • 2010
  • There should be a need for measures to build up environmentally friendly transport system with new town for residence being built near metropolitan area. In order to promote the development of station influence area, convenience for public transport users and LRT(Light Rail Transit) construction, request for the speed improvement of urban transit is on the rise for easy access to the metropolitan area. This paper delves into the efficient operation of high speed train suitable for passenger demand estimates, and seeks to ensure integrated transportation system with subway Line 9 following the construction of Gimpo urban railway.

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New Electrified Rail Impact on Conventional Railroad ; An Empirical Analysis (서울~천안간 전철 개통후 일반철도 수요변화 분석)

  • Kim Jyoung-Tae;Lee Jin-Sun
    • Journal of the Korean Society for Railway
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    • v.8 no.6 s.31
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    • pp.592-596
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    • 2005
  • This study analyzed changes of train operation between Seoul~Cheonan after the introduction of new electrified rail in 2005. As expected number of passengers were reduced at specific service section and several railroad stations which were served by the Mugunghwa. Also, the statistic shows that passenter demand concentrated in a specific time, so train service frequency and level of service need to be modified to meet with changed demand pattern. The purpose of this paper is to identify critical demand pattern, especially, in several section of the railroad system. This studies provide a railroad transportation system that is significantly more efficient, with far greater capacity, by providing solutions to the problems of congestion impact.

Evaluation of running safety for korean high speed railway vehicle (한국형 고속철도차량의 주행안전성 평가)

  • Ham Young-Sam;Hur Hyun-Moo
    • Proceedings of the KSR Conference
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    • 2003.10c
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    • pp.316-321
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    • 2003
  • The railroad is a means of large transportation which has many talents such as a safety and a regularity. That is a results from various confidential performance tests and evaluations of the system. The railroad system consist of various subsystems - vehicle, power supply, signal, communications, track structures, operations, etc. Among them, as an item of safety evaluation there is a measurement of wheel/rail force, so called a measurement of derailment coefficient. This is a very important item because a derailment of a train will bring about a big accident. Especially it is more important in high speed rail of which operation speed is over two times as fast as existing rail. In this paper, it is introduced to preprocess the wheelset for measuring wheel/rail force of high speed rail, such as to treat a measuring wheelset, adhesion of strain gauges and static load test, running test result of main line.

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Computer Model for Railway Inductive Power Supply Using the Valtchev Model

  • Dias, Joao Victor Pinon Pereira;Kim, Hyung-Chul;Jang, Dong-Uk
    • Journal of international Conference on Electrical Machines and Systems
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    • v.1 no.1
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    • pp.40-46
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    • 2012
  • This paper presents contactless power supply systems using the Valtchev model in transportation systems. The major drawback of contactless systems is that the efficiency is lower than that of contact systems. The coupling coefficient of the contactless transformer is the most influential parameter on the system efficiency. Here, a new computer model for the contactless transfer system developed in the Korea Railroad Research Institute is presented. Also, simulations of the old model and the new model are compared with the prototype measurement to assure the model validity.

Impact factor and Dynamic response of Daejon Maglev Guideway under the Sleeper Conditions (침목 간격에 따른 자기부상 시험선로 가이드웨이의 동적응답분석 및 충격계수산정)

  • Hong, Yu-Na;Chung, Won-Seok;Yeo, In-Ho
    • Proceedings of the KSR Conference
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    • 2008.11b
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    • pp.846-853
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    • 2008
  • Maglev System is expected to be a new public transportation for future because of its special characteristics. Sleepers of railway role on transferring the lateral load to guideway for Maglev and controlling the distance between rails. Variation of distance of sleepers can affect dynamic responses for maglev guideway. In this paper, Daejon maglev guideway is analyzed to find proper tie spacing of a maglev system. The analysis included using a maglev trainload and also the dead load as the primary forces on bridges. Not only the dynamic behavior of bridges is investigated under sleeper conditions, but also impact factor about vertical displacement on the guideway is produced. This guideway is analyzed in four cases followed by changing spacing of sleeper and then obtained dynamic characteristics such as displacements, acceleration and impact factor by Finite Element Analysis.

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